Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$34.8M |
| 2 |
Bausch Health
BHC
|
+$20.3M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$18.9M |
| 4 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$12.3M |
| 5 |
Amazon
AMZN
|
+$12.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.8M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$12.1M |
| 4 |
Netflix
NFLX
|
+$10.7M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 51.63% |
| 2 | Consumer Discretionary | 9.7% |
| 3 | Healthcare | 7.81% |
| 4 | Technology | 7.23% |
| 5 | Communication Services | 6.86% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
CALL
American Airlines Group
AAL
$8.69B
| $966K | 0.08% |
4,314
-268
| -6% | -$11.6K |
|
227
CALL
Amgen
AMGN
$236B
| $964K | 0.08% |
1,161
-1,170
| -50% | -$184K |
|
228
PUT
Las Vegas Sands
LVS
$28.7B
| $958K | 0.08% |
1,756
-295
| -14% | -$13.4K |
|
|
RLYP
229
DELISTED
RELYPSA INC COM
RLYP
| $958K | 0.08% |
33,826
+28,610
| +549% | +$616K |
|
|
RDS.B
230
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $952K | 0.07% |
20,694
+7,506
| +57% | +$379K |
|
231
Community Health Systems
CYH
$408M
| $942K | 0.07% |
+42,974
| New | +$1.11M |
|
232
PUT
Macy's
M
$6.06B
| $941K | 0.07% |
1,543
+368
| +31% | +$15.9K |
|
233
Puma Biotechnology
PBYI
$493M
| $940K | 0.07% |
11,991
+2,181
| +22% | +$171K |
|
234
PUT
United States Oil Fund
USO
$1.61B
| $936K | 0.07% |
406
+75
| +23% | +$7.99K |
|
235
Crown Castle
CCI
$32.3B
| $935K | 0.07% |
10,820
+7,499
| +226% | +$636K |
|
|
STRZA
236
DELISTED
Starz - Series A
STRZA
| $926K | 0.07% |
+27,657
| New | +$986K |
|
237
Delta Air Lines
DAL
$52.7B
| $925K | 0.07% |
18,264
+3,295
| +22% | +$163K |
|
238
CALL
Home Depot
HD
$320B
| $922K | 0.07% |
1,393
+345
| +33% | +$43.9K |
|
239
Paychex
PAYX
$43.3B
| $922K | 0.07% |
+17,438
| New | +$912K |
|
|
TWX
240
PUT
DELISTED
Time Warner Inc
TWX
| $922K | 0.07% |
1,246
+670
| +116% | +$46.8K |
|
241
Skyworks Solutions
SWKS
$11.1B
| $912K | 0.07% |
11,882
-13,554
| -53% | -$1.09M |
|
242
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.92B
| $905K | 0.07% |
36,460
-11,830
| -24% | -$43.8K |
|
|
EMC
243
DELISTED
EMC CORPORATION
EMC
| $905K | 0.07% |
+35,251
| New | +$915K |
|
244
PUT
Pfizer
PFE
$162B
| $903K | 0.07% |
5,255
+2,550
| +94% | +$80.2K |
|
245
BP
BP
$113B
| $902K | 0.07% |
34,296
-51,667
| -60% | -$1.47M |
|
|
YHOO
246
PUT
DELISTED
Yahoo Inc
YHOO
| $895K | 0.07% |
1,278
-2,152
| -63% | -$71.8K |
|
247
Bunge Global
BG
$22.8B
| $892K | 0.07% |
13,078
+2,040
| +18% | +$144K |
|
|
JOY
248
PUT
DELISTED
Joy Global Inc
JOY
| $882K | 0.07% |
1,580
+344
| +28% | +$5.2K |
|
249
PUT
MannKind Corp
MNKD
$1.31B
| $881K | 0.07% |
532
+380
| +250% | +$4.67K |
|
|
PPLC
250
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $879K | 0.07% |
1,409
+951
| +208% | +$24.8K |
|
Similar funds
Simplex Trading's Q4 2015 Portfolio in Review
As of Q4 2015, Simplex Trading held 7,008 positions worth $1.28B, down 6.4% from $1.36B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading deployed $39.7M of net new capital in Q4 2015, opening 1,415 new positions and adding to 1,993 existing holdings. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
By sector, the portfolio is most concentrated in Miscellaneous at 52% of assets, down from 65% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $13.8M trimmed.
- Simplex Trading's largest Q4 2015 buy was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
- Simplex Trading added most to Apple in Q4 2015, an estimated $34.8M increase.
- Simplex Trading's biggest Q4 2015 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $13.8M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2015, selling an estimated $27.5M.
- Simplex Trading's ten largest holdings make up 19% of its $1.28B portfolio in Q4 2015.
- Simplex Trading opened 1,415 new positions and closed 1,598 in Q4 2015.
- Simplex Trading's portfolio value fell 6.4% quarter-over-quarter to $1.28B.
Based on Simplex Trading's 13F filing for Q4 2015, filed 20 Jan 2016.